熔模精密铸造法制备Nb丝/TiAl基复合材料的工艺研究  

Study on Process of Nb Fiber/TiAl Composite Material Prepared by Precision Investment Casting Method

作　　者：王微[1] 李振亚[2] 彭德林[2] 王刚 

机构地区：[1]安徽机电职业技术学院机械系,安徽芜湖241000 [2]哈尔滨工业大学材料学院,黑龙江哈尔滨150001 [3]安徽工程大学机械与汽车工程学院,安徽芜湖241000

出　　处：《热加工工艺》2015年第11期110-113,共4页Hot Working Technology

基　　金：安徽省高校省级自然科学研究项目(KJ2014A023);安徽工程大学博士科研启动基金项目(2012YQQ006)

摘　　要：利用冷壁坩埚感应熔炼技术、熔模铸造型壳及离心浇注的方法,对Nb丝增强Ti Al基复合材料的制备进行了工艺探索。主要研究了专用陶瓷型壳的制备和离心浇注工艺。结果表明,采用熔模铸造型壳制备的方法可以制备出型腔中含有Nb丝的专用陶瓷型壳,从而解决了增强体在铸型中的固定和均匀分布问题。利用离心浇注工艺能够获得Nb丝增强Ti Al基复合材料。Nb丝在复合材料中分布均匀、界面结合良好。The preparation process of Ti Al matrix composite material reinforced by Nb fiber was explored by using the cold wall crucible induction melting technique, investment casting shell and the method of centrifugal casting. The preparation of special ceramic shell and the process of centrifugal casting were mainly studied. The results show that special ceramic shell with Nb fibers in die cavity can be prepared by using investment casting shell preparation method, which solves the problem of uniform distribution and fixity for reinforcement. Ti Al matrix composite material reinforced by Nb fiber can be obtained by using centrifugal casting process. Nb fibers distribution in composite material is uniform and interface bonding is good.

关 键 词：复合材料 熔模铸造 Nb丝 陶瓷型壳 

分 类 号：TG249.5[机械工程—精密仪器及机械]